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Vulnerability · Published Apr 7, 2020 · Assigned by mitre

CVE-2020-11612

High 7.5

In plain English

A high-severity security flaw in the netty package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 9.2% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)9.2%top 4.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netty1:4.1.48-1DEBIAN-CVE-2020-11612
Debian:13netty1:4.1.48-1DEBIAN-CVE-2020-11612
Debian:14netty1:4.1.48-1DEBIAN-CVE-2020-11612
Mavenio.netty:netty-handler4.1.46GHSA-mm9x-g8pc-w292
Ubuntu:22.04:LTSnetty1:4.1.48-4+deb11u1build0.22.04.1USN-6049-1

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References